The voyager is a Great flying plane you will enjoy it. I used a tower 46 on mine inverted. It took a litttle break-in time and adjustment to get it running properly inverted, but it ran flawlessly. THe engine will really unload in the air so it should be tuned rich on the ground. At first I had some problems with it inverted and I lowered the tank to the floor. THat diffinately made the mixture more even regardless of fuel level or plane attitude. I used a 11x6 and a 11x7 propeller and the plane was relatively fast.